pyramidal face
1.When the ZnO mixed with SnCl2·2H2O were used as precursor,many different shapes of Sn doped ZnO crystals were obtained. And the rate of growth along c-axic was weakened apparently,so the positive polar face c{0001} can expose more area. And also exposed negative polar-c{0001},positive pyramidal face p{1010},negative pyramidal face-p{101 1} and hexagonal face m{1010}.
